<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <title>title</title>
    <style type="text/css">
        body{
            margin: 0;
            padding: 0;
        }

    </style>
</head>
<body>
<div id="app">
    <#if age?? >
        <p>not age</p>
    </#if>

    <#if name?? >
        <p>${name?size}</p>
    </#if>

    <#if user??>
        <p>${user.name}</p>
    </#if>

    <#if user.pass>
        <p>${user.age}</p>
    </#if>

</div>
</body>
</html>
